Unit One 1
Text A Alfred Nobel—A Man of Contrasts 1
Text B He Led a Useful Life 6
Unit Two 11
Text A Alexander Graham Bell 11
Text B The Laser 19
Unit Three 24
Text A Oxidation 24
Text B Radar 29
Text A This is M.I.T 34
Unit Four 34
Text B Educational Resources at M.I.T 40
Unit Five 45
Text A Water Supplies—A Growing Problem 45
Text B The Great Changes of the Surface of the Earth 49
Unit Six 54
Text A What Is Artificial Intelligence? 54
Text B Science and the Future 60
Unit Seven 65
Text A Selecting a Personal Computer System 65
Text B Multimedia 70
Text A Database 76
Unit Eight 76
Text B Computer Viruses 81
Unit Nine 88
Text A Introduction to Control Engineering 88
Text B Applications of Automatic Control 93
Unit Ten 99
Text A What Is Electricity? 99
Text B Electricity and Electronics 104
Unit Eleven 108
Text A Electric Power System 108
Text B Electric System Monitoring 116
Text A Hydro-electric Power 122
Unit Twelve 122
Text B Direct Current Generators and Motors 131
Unit Thirteen 138
Text A How a Coal-fired Power Plant Works 138
Text B Fossil-fuel Boilers for Electric Utilities 143
Unit Fourteen 150
Text A Nuclear Power Plants 150
Text B Solar Energy 156
Unit Fifteen 162
Text A Electric Power Substations and Transformers 162
Text B Computers and the Electric Power Industry 168